content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.basetypes;
  
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
  
  /**
   * Run a Nono after another Nono.
   */
  final class NonoAndThen extends Nono {
  
      final Nono before;
  
      final Nono after;
  
      NonoAndThen(Nono before, Nono after) {
          this.before = before;
          this.after = after;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super Void> s) {
          before.subscribe(new AndThenSubscriber(s, after));
      }
  
      static final class AndThenSubscriber extends BasicRefQueueSubscription<Void, Subscription>
      implements Subscriber<Void> {
  
          private static final long serialVersionUID = 5073982210916423158L;
  
          final Subscriber<? super Void> downstream;
  
          final Nono after;
  
          AndThenSubscriber(Subscriber<? super Void> downstream, Nono after) {
              this.downstream = downstream;
              this.after = after;
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              if (SubscriptionHelper.setOnce(this, s)) {
                  downstream.onSubscribe(this);
              }
          }
  
          @Override
          public void onNext(Void t) {
              // never called
          }
  
          @Override
          public void onError(Throwable t) {
              downstream.onError(t);
          }
  
          @Override
          public void onComplete() {
              after.subscribe(new OtherSubscriber());
          }
  
          @Override
          public void cancel() {
              SubscriptionHelper.cancel(this);
          }
  
          void innerSubscribe(Subscription s) {
              SubscriptionHelper.replace(this, s);
          }
  
          final class OtherSubscriber implements Subscriber<Void> {
  
              @Override
              public void onSubscribe(Subscription s) {
                  innerSubscribe(s);
              }
  
              @Override
              public void onNext(Void t) {
                  // never called
              }
  
              @Override
              public void onError(Throwable t) {
                  downstream.onError(t);
              }
  
              @Override
              public void onComplete() {
                  downstream.onComplete();
              }
          }
      }
  }
  